Irresistibly Fudgy Oreo Brownies: The Easiest Recipe Using Boxed Mix
Prepare yourself for an utterly delightful dessert experience with these **Irresistibly Fudgy Oreo Brownies**! This recipe takes the classic brownie and elevates it to a whole new level of indulgence by incorporating everyone’s favorite cookie, the Oreo. Imagine: rich, chocolatey brownie batter layered with whole Oreo cookies in the middle, then crowned with a scattering of chopped Oreos on top. The result? A perfectly harmonious blend of fudgy brownie goodness and the iconic crunch and creaminess of Oreos in every single bite. These aren’t just brownies; they’re a celebration of chocolate and cookie perfection, guaranteed to be a hit with every sweet tooth!
What makes this recipe truly special is its incredible simplicity. We’re leveraging the convenience of a high-quality brownie mix and “doctoring it up” just enough to create something extraordinary with minimal effort. This approach means you can achieve bakery-quality results right in your own kitchen, even on a busy weeknight. If you’re a fan of taking simple ingredients and turning them into show-stopping treats, you’ll love this method. For instance, my Buckeye Brownies demonstrate how a brownie mix can be transformed into a decadent peanut butter brownie, complete with a luscious sweetened peanut butter layer and a smooth chocolate ganache.
If the idea of these fudgy, chocolate-packed delights has captured your imagination, then you’re in for a treat! Make sure to explore the rest of my Oreo Desserts collection. You absolutely must try my Oreo Truffle Brownies, which feature a luxurious layer of Oreo truffle (a heavenly mix of cream cheese and Oreo crumbs) topped with a glossy chocolate ganache. Each recipe promises a unique and irresistible twist on the beloved Oreo cookie, ensuring your dessert table is always exciting and delicious!

Why These Fudgy Oreo Brownies Are a Must-Try
These **fudgy Oreo brownies** aren’t just another dessert; they’re a game-changer! Here’s a closer look at what makes this recipe absolutely exceptional and why it will become your new go-to for a quick, impressive treat:
- Oreo-Packed Perfection: What sets these apart is the generous inclusion of Oreo cookies. We strategically layer whole Oreos right in the middle of the brownie batter, ensuring that every slice boasts a delightful cookie center. As they bake, the Oreos soften just enough to integrate beautifully with the fudgy brownie, yet they retain their distinctive texture and unmistakable flavor. You won’t lose the taste or presence of the Oreos here; they stand out as a delicious highlight! Plus, the chopped Oreos sprinkled on top add an extra crunch and visual appeal, signaling the cookie delight within.
- Effortless Elegance with Brownie Mix: Say goodbye to complicated baking! This recipe champions simplicity by utilizing two boxes of your favorite brownie mix. I’m a firm believer in the magic of high-quality boxed mixes, especially Ghirardelli (which I often stock up on at Costco). Using a mix drastically cuts down on prep time and makes this **easy Oreo brownie recipe** accessible for bakers of all skill levels. It proves that you don’t need to make everything from scratch to create a show-stopping dessert. It’s the perfect hack for when you crave homemade taste without the extensive effort.
- Achieve Ultimate Fudginess: If you adore incredibly moist, dense, and **fudgy brownies**, then this recipe is tailored for you. The secret lies in a precise baking technique: remove the brownies from the oven when their tops are wonderfully crackly, but a toothpick inserted into the center still comes out with moist batter crumbs attached. This is typically around 45 minutes, but oven temperatures can vary. The crucial instruction is to resist the urge to overbake! Overbaking is the arch-nemesis of fudgy brownies, turning them cakey and dry. Trust the process, and you’ll be rewarded with an amazingly fudgy texture that melts in your mouth.
- A Guaranteed Crowd-Pleaser: Whether it’s a family gathering, a potluck, a birthday party, or just a treat for yourself, these Oreo brownies are always a hit. The familiar and beloved flavors of chocolate and Oreos combined in a rich, fudgy format make them universally appealing. They’re visually stunning with the Oreo layers and topping, and their taste will leave everyone asking for the recipe.
Key Ingredients for Your Decadent Oreo Brownies
Crafting these **delightful Oreo brownies** requires just a few simple ingredients, making it a stress-free baking adventure. Here’s a detailed look at what you’ll need to achieve maximum flavor and fudginess:

- Boxed Brownie Mix: This is the hero of our easy recipe! You’ll need two boxes of brownie mix, along with the additional ingredients typically listed on the box (most commonly eggs, water, and vegetable oil or melted butter). My personal preference is the Ghirardelli brand because it consistently delivers an incredibly rich, fudgy base that perfectly complements the Oreos. However, this recipe is quite flexible! You can use two 20 oz brownie mixes, or if those aren’t available, two 18.3 oz or two 18 oz boxes will work just as well. The key is to get enough batter to create thick, substantial brownies. Always check the specific instructions on your chosen box for the exact quantities of wet ingredients needed.
- Oreo Cookies: The star of the show! You’ll want two types of Oreo preparation for this recipe.
- Whole Oreos: These are for creating that fantastic surprise layer in the middle of your brownies. Choose classic Original Oreos for that signature chocolate cookie and creamy filling flavor. You’ll arrange these side-by-side to cover the entire surface of the brownie batter, ensuring every piece has a delightful cookie center.
- Chopped Oreos: A handful of roughly chopped Oreos will be sprinkled on top of the brownie batter before baking. This adds a wonderful textural contrast—a slight crunch—and an extra burst of Oreo flavor and visual appeal to the finished brownies. You can simply give them a rough chop with a knife or pulse them briefly in a food processor for varying sizes of chunks.
For the best flavor, I highly recommend sticking with the brand-name Oreos. Their unique flavor profile and texture are what make these brownies truly exceptional. Generic brands might not deliver the same irresistible taste.
Effortless Step-by-Step Instructions for Your Fudgy Oreo Brownies
Get ready to create these incredible **Oreo brownies** with surprising ease! Follow these clear, simple steps to bake a batch of fudgy, cookie-studded perfection.
- Prepare Your Brownie Batter: Begin by preheating your oven to 325°F (160°C). Then, prepare a 9×13-inch baking pan by spraying it generously with nonstick cooking spray. This will prevent sticking and make for easy removal later. In a large mixing bowl, combine the contents of both brownie mix boxes with the additional ingredients (eggs, water, oil, etc.) as directed on the brownie box packaging. Remember, you are doubling the recipe, so ensure you use the combined amounts for two boxes. Stir until just combined; it’s crucial not to overmix the batter for fudgy results. A few lumps are perfectly fine!


- Layer the First Half of Batter: Carefully spoon approximately half of the prepared brownie batter into your greased 9×13-inch baking pan. Use an offset spatula or the back of a spoon to gently spread the batter into an even layer, making sure it covers the entire bottom of the pan. This will create a sturdy foundation for our Oreo layer.
- Add Your Oreo Layer: Now for the fun part! Take your whole Oreo cookies and arrange them neatly in a single layer on top of the brownie batter, covering the entire surface. You might need about 20-24 Oreos, depending on how tightly you pack them. Don’t worry if there are tiny gaps; the batter will fill them in. This layer is what will give your brownies that incredible cookie surprise in the middle.
- Top with Remaining Batter: Gently pour the remaining half of the brownie batter over the layer of Oreos. Carefully spread it out, ensuring that the batter completely covers all the Oreos. You want a smooth, even surface of brownie batter across the entire pan, encasing the cookies underneath.



- Garnish with Chopped Oreos: Before baking, take your roughly chopped Oreo pieces and evenly distribute them over the top layer of brownie batter. This will create a beautiful, textured crust and add an extra layer of cookie goodness and visual appeal to your finished brownies.
- Bake to Fudgy Perfection: Place your pan of **Oreo brownies** on the middle rack of your preheated oven and bake for approximately 45 minutes. The key to achieving that perfect fudgy texture is knowing when to pull them out. Look for a visibly crackly top, and when you insert a toothpick into the center, it should come out with moist crumbs clinging to it, not completely clean. This indicates they are perfectly underdone, which is exactly what we want for ultimate fudginess! Once baked, remove the pan from the oven and let the brownies cool completely for at least 1-2 hours on a wire rack before attempting to cut them. As they cool, they will continue to set and firm up, resulting in wonderfully dense and moist squares. Enjoy your homemade, ridiculously fudgy Oreo brownies!


Expert Tips for Perfect Fudgy Oreo Brownies
Achieving the perfect batch of **fudgy Oreo brownies** is easy, especially with these insider tips:
- Choose Quality Oreos: For the most authentic and delicious flavor, I highly recommend using brand-name Oreos rather than generic store-brand versions. The distinct chocolate cookie and creamy filling of classic Oreos are integral to the signature taste of these brownies. It truly makes a difference in the final product!
- The Plastic Knife Trick: To get perfectly clean cuts and avoid your rich, **fudgy Oreo brownies** sticking to the knife, use a plastic knife! The non-stick properties of plastic work wonders for slicing through dense brownies without dragging or tearing. This simple trick will make cutting a breeze and leave you with beautifully presented squares.
- Don’t Overmix the Batter: This is a golden rule for all brownie recipes aiming for fudginess! Once you’ve added the wet ingredients to the brownie mix, stir only until the dry ingredients have *just* disappeared. A few small lumps are absolutely fine—in fact, they’re preferred. Overmixing develops the gluten in the flour, leading to a tougher, more cake-like brownie texture instead of the desired fudgy one.
- Parchment Paper for Easy Removal: While nonstick spray works well, lining your baking pan with parchment paper is an excellent alternative, especially if you want to easily lift the entire slab of brownies out of the pan for cutting. For best results, scrunch the parchment paper into a ball first, then smooth it out to fit the pan. This technique helps the paper lay flatter and adhere better to the pan’s corners and sides. Leave an overhang on two sides to act as “handles.”
Creative Variations and Serving Suggestions
The beauty of these layered brownies is how adaptable they are! While **Oreo brownies** are a masterpiece on their own, the layering technique opens up a world of possibilities for customization and serving:
- Endless Layering Possibilities: Seriously, layering chocolate Oreo cookies in the middle of the brownie batter is a mind-blowing revelation! This concept can be applied to so many other treats. Imagine:
- Reese’s Peanut Butter Cup Brownies: Layer mini Reese’s cups for an irresistible chocolate and peanut butter fusion.
- Rolo Brownies: The gooey caramel from melted Rolos would be a divine surprise in the center.
- S’mores Brownies: Combine graham crackers, mini marshmallows, and chocolate pieces for a campfire-inspired treat.
- Mint Oreo Brownies: Use mint-flavored Oreos for a cool, refreshing twist.
- Caramel Drizzle: Drizzle homemade or store-bought caramel sauce over the top before serving for extra decadence.
The options truly are endless, igniting a spark for countless future baking adventures!
- Small Batch Brownies: If you’re craving a smaller, more intimate serving of brownies or prefer to make your batter from scratch, simply prepare my Small Batch Brownies recipe and then top with the delightful Oreo chunks. It’s a fantastic way to enjoy a tailored portion of this beloved dessert.
- Oreo Muddy Buddies Companion: For another easy and incredibly delicious Oreo-infused snack, try my Oreo Muddy Buddies. They offer a different texture and experience but share the same irresistible Oreo flavor profile.
- Serving Suggestions:
- Classic: Enjoy them plain with a tall glass of cold milk.
- À la Mode: Serve warm brownies with a scoop of vanilla bean ice cream. The contrast between warm brownie and cold ice cream is heavenly.
- Whipped Cream & Berries: A dollop of fresh whipped cream and a few fresh berries (strawberries or raspberries) can add a touch of lightness and fruitiness.
- Chocolate Drizzle: A quick drizzle of melted chocolate or chocolate syrup takes them over the top.
Make Ahead, Storing, and Freezing Instructions
Planning ahead or dealing with leftovers? Here’s how to ensure your **fudgy Oreo brownies** stay fresh and delicious:
- Make Ahead: Due to the layer of Oreos nestled within the brownie batter, I do not recommend preparing the batter ahead of time and baking it later. The moisture from the batter can cause the Oreos to become too soft or even soggy if left unbaked for an extended period. For optimal texture, mix the batter and bake the brownies immediately.
- Storing: Once completely cooled, store your **Oreo brownies** in a single layer in a ziplock bag or an airtight container at room temperature. They will remain wonderfully fresh and fudgy for up to 4 days. For extended freshness, you can also store them in the refrigerator, but allow them to come to room temperature before serving for the best texture.
- Freezing: These brownies freeze exceptionally well, making them perfect for meal prep or enjoying a treat whenever a craving strikes!
- Freezing the Whole Pan: After the brownies have cooled completely, wrap the entire pan tightly twice in plastic wrap, then once more in aluminum foil. Store in the freezer for up to 1 month. To thaw, simply remove from the freezer and let it sit in the refrigerator overnight, or on the counter for a few hours.
- Freezing Individual Squares: For convenient grab-and-go portions, cut the cooled brownies into individual squares. Wrap each square tightly in plastic wrap, then place them in a freezer-safe ziplock bag or airtight container. They can be stored in the freezer for up to 2 months. To enjoy, simply remove a square and let it thaw in the fridge or at room temperature for about 30 minutes. You can even gently warm them in the microwave for a few seconds for that freshly baked feel.

Frequently Asked Questions About Fudgy Oreo Brownies
Absolutely, freezing **Oreo brownies** is a fantastic way to preserve them and enjoy them later! You have a couple of options: you can freeze the entire pan (once completely cooled, wrap it tightly twice in plastic wrap and then in foil, and freeze for up to 1 month). To thaw, simply place the pan in the fridge overnight. Alternatively, for individual servings, cut the brownies into squares, wrap each piece in plastic wrap, and store them in a freezer-safe ziplock bag. These individual squares can be kept for up to 2 months and thawed in the fridge or at room temperature as needed.
It’s incredibly simple and yields amazing results! First, preheat your oven to 325°F and grease a 9×13-inch baking pan. Prepare two boxes of brownie mix according to their package directions, combining all ingredients in a large bowl until just mixed. Pour half of the batter into the prepared pan and spread evenly. Then, arrange whole Oreo cookies over this layer, covering the entire surface. Pour the remaining brownie batter over the Oreos, spreading it smoothly to cover them completely. Finally, sprinkle roughly chopped Oreos over the top. Bake for about 45 minutes until the top is crinkly and a toothpick inserted in the center comes out with moist crumbs. Let them cool completely for 1-2 hours for ultimate fudginess before slicing.
If your brownies turn out hard or dry, the most common culprit is overbaking. The “magic number” for these **fudgy Oreo brownies** is around 45 minutes, but oven temperatures can vary significantly. It’s always better to pull brownies out slightly early rather than too late. When testing for doneness, look for a crinkly top, and when you insert a toothpick into the center of the pan, it should come out with moist brownie batter or moist crumbs still attached. A clean toothpick means they are overbaked and will result in a cakey or hard texture. Embracing the slight under-baked state is the secret to achieving truly rich and fudgy brownies!
Fudgy brownies are characterized by a higher ratio of fat (butter, oil) to flour, which contributes to their dense, moist, and chewy texture. In contrast, cakey brownies typically have more flour and often leavening agents that give them a lighter, fluffier crumb. However, ingredients aren’t the only factor! Even with the perfect fudgy brownie recipe, overbaking will transform them into a drier, harder, or more cake-like consistency. To ensure maximum fudginess, always err on the side of slightly underbaking. Remove the brownies from the oven when a toothpick inserted into the center still has moist crumbs clinging to it, not when it comes out completely clean. Allowing them to cool completely in the pan also helps them set into that desirable fudgy state.
Absolutely! While the classic Original Oreos are fantastic for this recipe, feel free to experiment with other varieties to customize your **Oreo brownies**. Double Stuffed Oreos will add an extra layer of creamy filling, making your brownies even more decadent. Flavored Oreos, such as Mint, Peanut Butter, or Golden Oreos, could introduce exciting new flavor profiles. Just ensure they are full-sized cookies for the layered middle. The chopped Oreos on top can also be any flavor you desire to match or contrast the layered ones!

Explore More Decadent Brownie Recipes
If you’re a true brownie connoisseur, your culinary journey doesn’t have to end with these amazing **Oreo brownies**! Dive into more of my delightful brownie creations, each offering a unique twist on this classic dessert:
- BYU Mint Brownies: A refreshing and rich brownie with a cool minty layer.
- Homemade Brownies: For those who love to bake from scratch, this recipe is a classic.
- Lunch Lady Brownies: A nostalgic, moist, and chocolatey treat reminiscent of school days.
- Nutella Brownies: Swirls of hazelnut-chocolate goodness in every bite.
- Cosmic Brownies: A fun, sprinkle-topped favorite that’s out of this world.
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Fudgy Oreo Brownies
Ingredients
- 2 20 oz boxed brownie mix – AND INGREDIENTS CALLED FOR ON THE BOX (typically eggs, water, and vegetable oil). I used Ghirardelli brand for its rich, fudgy results. This recipe is very forgiving so you can also use two 18.3 oz box brownie mixes or two 18 oz brownie mixes.
- 24 Oreo cookies – for layering in the middle
- 6 Oreo cookies – roughly chopped, for topping
Equipment
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13″x9″ glass baking pan
Instructions
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Preheat the oven to 325°F (160°C). Spray a 9”x13” inch baking pan generously with nonstick cooking spray, or line it with parchment paper for easy removal. Set the prepared pan aside.
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In a large mixing bowl, combine the contents of both boxed brownie mixes and the additional ingredients called for on their directions (usually eggs, water, and vegetable oil). Stir until the ingredients are just combined and no dry spots remain; be careful not to overmix to ensure fudgy brownies.
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Spoon about half of the brownie batter into the prepared baking pan. Use an offset spatula or the back of a spoon to spread it evenly across the bottom, creating a smooth layer.
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Carefully arrange the whole Oreo cookies (approximately 24, but you may need 20-24 depending on spacing) in a single layer over the brownie batter. Make sure to cover the entire surface to ensure an Oreo in every bite. Pour the remaining brownie batter over the Oreos and gently smooth it into an even layer, ensuring all the Oreos are completely covered.
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Evenly sprinkle the roughly chopped Oreo pieces over the top layer of brownie batter. This adds extra texture and visual appeal.
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Bake in the preheated oven for approximately 45 minutes on the middle rack. The brownies are done when the top has a noticeable crinkly crust and a toothpick inserted into the center comes out with moist crumbs still clinging to it (not completely clean, which indicates overbaking). This slight under-bake is key for super fudgy brownies! Once baked, remove from the oven and let the brownies cool completely in the pan for 1-2 hours before cutting into squares. They will set up beautifully as they cool, becoming perfectly fudgy.